GenerateNodes Method

Visual Basic (Declaration)
Visual Basic (Usage)
C#
Managed Extensions for C++
C++/CLI

Public Sub GenerateNodes()

Dim instance As MibNodes
 
instance.GenerateNodes()

public void GenerateNodes()

public: void GenerateNodes();

public:
void GenerateNodes();

Parse will normally be called one or more times before this method is used.

The following example demonstrates loading a MIB file at runtime, and retrieving the value of an object defined in that MIB from an agent.

C#

/* This snippet uses a MIB file with the following content:
        
DART-TEST-MIB DEFINITIONS ::= BEGIN

IMPORTS
        private
                FROM RFC1155-SMI
        OBJECT-TYPE
                FROM RFC-1212
        DisplayString
                FROM RFC-1213;

dart        OBJECT IDENTIFIER ::= {private 42}

testString OBJECT-TYPE
    SYNTAX  DisplayString
    ACCESS  read-write
    STATUS  optional
    DESCRIPTION
            "This is a description for a string"
    ::= {dart 1}

*/

private void Form1_Load(object sender, EventArgs e)
{
    //Load the MIB file defined above
    using (FileStream fs = new FileStream("DART-TEST-MIB.mib", FileMode.Open, FileAccess.Read))
        manager1.Mib.Parse(fs);
    //Parse additional MIBs here, before calling GenerateNodes()
    manager1.Mib.GenerateNodes();
}

private void button1_Click(object sender, EventArgs e)
{
    //Create and send request for 'testString' from the MIB, on a worker thread
    manager1.Start(manager1_SendGetRequest, new Variable(manager1.Mib["testString"]));
}

private void manager1_SendGetRequest(SnmpSocket managerSocket, object state)
{
    //Create Get Request
    GetMessage request = new GetMessage();
    request.Variables.Add(state as Variable);

    //Send request and get response
    ResponseMessage response = managerSocket.GetResponse(request, myAgentAddress);

    //Marshal message to the UI thread using the Message event
    manager1.Marshal(new ResponseMessage[] { response }, "", null);
}

private void manager1_Message(object sender, MessageEventArgs e)
{
    //Display info about the first variable in the response, and its value
    Variable vari = e.Messages[0].Variables[0];
    label1.Text = vari.Definition.ToString() + vari.Value.ToString();
}

Visual Basic

' This snippet uses a MIB file with the following content:
'        
'DART-TEST-MIB DEFINITIONS ::= BEGIN
'
'IMPORTS
'        private
'                FROM RFC1155-SMI
'        OBJECT-TYPE
'                FROM RFC-1212
'        DisplayString
'                FROM RFC-1213;
'
'dart        OBJECT IDENTIFIER ::= {private 42}
'
'testString OBJECT-TYPE
'    SYNTAX  DisplayString
'    ACCESS  read-write
'    STATUS  optional
'    DESCRIPTION
'            "This is a description for a string"
'    ::= {dart 1}
'
'

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    'Load the MIB file defined above
    Using fs As New FileStream("DART-TEST-MIB.mib", FileMode.Open, FileAccess.Read)
        manager1.Mib.Parse(fs)
    End Using
    'Parse additional MIBs here, before calling GenerateNodes()
    manager1.Mib.GenerateNodes()
End Sub

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    'Create and send request for 'testString' from the MIB, on a worker thread
    manager1.Start(AddressOf manager1_SendGetRequest, New Variable(manager1.Mib("testString")))
End Sub

Private Sub manager1_SendGetRequest(ByVal managerSocket As SnmpSocket, ByVal state As Object)
    'Create Get Request
    Dim request As New GetMessage()
    request.Variables.Add(TryCast(state, Variable))

    'Send request and get response
    Dim response As ResponseMessage = managerSocket.GetResponse(request, myAgentAddress)

    'Marshal message to the UI thread using the Message event
    manager1.Marshal(New ResponseMessage() { response }, "", Nothing)
End Sub

Private Sub manager1_Message(ByVal sender As Object, ByVal e As MessageEventArgs)
    'Display info about the first variable in the response, and its value
    Dim vari As Variable = e.Messages(0).Variables(0)
    label1.Text = vari.Definition.ToString() & vari.Value.ToString()
End Sub

Reference

MibNodes Class
MibNodes Members